The TOPDON BT100 delivers fast, accurate testing for 12V batteries, cranking systems, and charging systems—all in one compact, cost-effective device. Designed for both pros and DIYers, it combines dealer-level accuracy, versatile functions, and simple operation to make diagnostics easy. From routine battery health checks to troubleshooting failures and dashboard warnings, the BT100 gives users the clarity needed to solve problems quickly and confidently.

Comprehensive Testing in a
Compact Tool

Highly accurate diagnostics in a portable design. Perfect for pros and DIYers.

Complete Battery Health Checks

Check SOH, SOC, and internal resistance and assess your battery before an issue arises. Three LED lights indicate if the battery is good, bad, or needs to be charged.

Understand True Starting Power

The BT100’s cranking test measures starting voltage and time, providing clear data on how the battery performs under starting stress.

Pinpoint Charging System Problems

Evaluate the vehicle’s charging system after engine start, including the alternator, regulator, and battery connections, to ensure voltage and current are within the proper range.

One Tester for All Lead-Acid 12V Batteries

Compatible with 12V Vehicles

Clear Results, Anytime, Anywhere

Featuring a 2-inch backlit LCD with an intuitive interface, it delivers accurate, easy-to-read results in any lighting—so you never have to squint or second-guess.

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